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  1. #include <stdio.h>
  2.  
  3. typedef unsigned long int uint32_t;
  4.  
  5. typedef union {
  6. 	struct
  7. 	{
  8.     	unsigned char bit1 : 1;
  9.     	unsigned char bit2 : 1;
  10. 	    unsigned char two_bits : 2;
  11.     	unsigned char four_bits : 4;
  12. 	};
  13. 	uint32_t raw;
  14. } Test;
  15.  
  16. int main(void) {
  17. 	Test test;
  18. 	printf( "Sizeof( test ) : %d\n", sizeof(test) );
  19. 	test.raw = 0;
  20. 	printf( "Raw : %d\n", test.raw );
  21. 	test.bit1 = 1;
  22. 	test.two_bits = 2;
  23. 	printf( "Raw : %d\n", test.raw );
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 2160KB
comments (?)
stdin
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Standard input is empty
stdout
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Sizeof( test ) : 4
Raw : 0
Raw : 9
https://ideone.com/QS01ob
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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